None of them.
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Nobody created any angles in my picture so I don't know of any reason for them doing so - not for why they did not!
If two angles are vertical then they are congruent.
Vertical angles can be supplementary angles if the lines are perpendicular and then both of the vertical angles would be 90 digress.
No, because by definition, vertical angles are not adjacent angles. Hope this helps
The Vertical Angles Theorem says that a pair of vertical angles are always congruent.